Crop classification using decision trees in Castilla y León (Spain) David A. Nafría Vicente del Blanco

Transcripción

1 Crop classification using decision trees in Castilla y León (Spain) David A. Nafría Vicente del Blanco

2 Objetives Create a raster dataset with annual crops and land identification. Include pastures and natural vegetation. It improves the quality of the crop classification and add users to the new product. Use the classification as a general purpose layer in multiple projects: Water use planning and water balances in aquifers. CAP Subsidies controls. Land cover dataset update assessment (LPIS). Agricultural Statistics (cropped area, common crop rotations, ). Environment monitoring.

3 Methodology Creation of the decision tree using machine learning techniques with a training subset -Independent variables- -Satellite images -Height, aspect Slope -Climate data -LPIS class Decision tree classifier Classifed cases: Píxels with assigned class

4 Cooperation with the environment department Training cases CAP applications Land Cover and Use Information System of Spain (SIOSE) National forest inventory Habitats maps (Natura 2000) In house digitalization Training preprocessing NDVI Fallow land Bare soil Vegetated (non-plough)

5 Satellite images DE GRNIR L Deimos-1 (PNT) 1-15/06/2014 Landsat- 8 12/Aug/2014

6 DEIMOS-Landsat overlay Deimos 2014 Landsat 2014 Orthophoto 2014 Landsat 2014

7 Layers for classification Satellite scenes per year: Deimos LandSat Independent variables per year:

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9 Results

10 Internal accuracy Cultivos Media Media TRIGO 85,96% 85,68% 85,82% 90,44% 80,71% 85,70% TRIGO REGADIO 68,46% 60,65% 64,56% 74,48% 52,71% 64,08% CEBADA 87,86% 90,11% 88,99% 93,06% 88,22% 89,81% CEBADA REGADIO 62,34% 50,50% 56,42% 59,34% 33,44% 51,41% OTROS CEREALES 44,59% 43,50% 44,05% 68,71% 39,42% 49,06% OTROS CEREALES REGADIO 90,89% 83,50% 87,20% 46,45% 71,72% 73,14% GIRASOL 91,22% 92,11% 91,67% 90,47% 88,88% 90,67% GIRASOL REGADIO 85,20% 78,59% 81,90% 75,22% 66,95% 76,49% ALFALFA 73,57% 79,22% 76,40% 65,09% 66,74% 71,16% ALFALFA REGADIO 90,86% 88,73% 89,80% 79,25% 84,27% 85,78% MAIZ 94,83% 94,36% 94,60% 98,28% 92,36% 94,96% REMOLACHA 96,66% 96,03% 96,35% 96,66% 93,40% 95,69% PATATAS 93,75% 91,57% 92,66% 85,15% 87,02% 89,37% GUISANTES 72,31% 77,37% 74,84% 57,81% 54,43% 65,48% COLZA 90,11% 86,36% 88,24% 61,24% 81,65% 79,84% VIÑEDO 98,69% 99,54% 99,12% 96,12% 88,38% 95,68% OLIVAR 99,90% 99,92% 99,91% 87,41% 93,07% 95,08% HORTICOLAS 99,66% 99,41% 99,54% 63,94% 97,95% 90,24% OTRAS LEGUMINOSAS GRANO 93,54% 93,47% 93,51% 64,17% 84,95% 84,03% FORRAJERAS 61,04% 68,83% 64,94% 64,88% 49,26% 61,00% FRUTALES 99,95% 99,98% 99,97% 75,88% 98,88% 93,67% FRUTALES CASCARA 99,47% 99,83% 99,65% 73,07% 94,97% 91,84% PASTIZAL 92,45% 92,59% 92,52% 90,43% 88,87% 91,09% MATORRAL 91,85% 89,90% 90,88% 91,67% 86,11% 89,88% CONIFERAS 91,69% 92,19% 91,94% 93,58% 90,25% 91,93% FRONDOSAS CADUCIFOLIAS 91,48% 91,23% 91,36% 89,75% 88,62% 90,27% FRONDOSAS SIEMPRE VERDES 76,46% 75,28% 75,87% 88,93% 74,19% 78,72% AROMATICAS 99,88% 99,84% 99,86% 50,43% 99,30% 87,36% OTROS CULTIVOS INDUSTRIALES 100% 100% 100,00% 54,56% 99,69% 88,56% SUELO DESNUDO 68,91% 72,36% 70,64% 73,03% 63,93% 69,56% ROQUEDOS 80,91% 83,21% 82,06% 89,44% 76,79% 82,59% URBANO-VIALES 99,92% 99,99% 99,96% 97,55% 99,24% 99,18% LAMINA AGUA 98,29% 97,48% 97,89% 87,51% 98,29% 95,39%

11 Actual accuracy 2014 Checked against frame area survey 2014 English Spanish Area (ha) % Right % Mistake ORCHARDS FRUTALES % VINEYARD VIÑEDO % 2% Girasol OLIVE TREES OLIVAR 27 94% CORN MAIZ % 2% Horticolas SUGAR BEET REMOLACHA % 2% Patatas AROMATIC HERBS AROMATICAS 12 92% 5% Otras Legu. Grano SUNFLOWER GIRASOL % 2% Suelo Desnudo BARLEY CEBADA % 9% Trigo RAPESEED COLZA % 6% Cebada POTATO PATATAS % 4% Otras Legu. Grano WHEAT TRIGO % 10% Cebada ALFALFA ALFALFA % 4% Cebada OTHER INDUSTRIAL CROPS OTROS CULTIVOS INDUSTRIALES 1 78% 17% Trigo CONIFERS CONIFERAS % 13% Matorral DRY PEAS GUISANTES % 14% Cebada DECIDUOUS FOREST FRONDOSAS CADUCIFOLIAS % 15% Frondosas Siem. Verde DEVELOPED LAND URBANO-VIALES % 12% Matorral VEGETABLES HORTICOLAS % 20% Otras Legu. Grano OTHER GRAIN LEGUMES OTRAS LEGUMINOSAS GRANO % 28% Forrajeras BUSH MATORRAL % 25% Pastizal OPEN WATER LAMINA AGUA % 19% Pastizal OTHER CEREALS OTROS CEREALES % 40% Trigo NUT TREES FRUTALES CASCARA 17 34% 19% Coniferas GRASS FORAGE FORRAJERAS % 27% Otros Cereales PASTURE PASTIZAL % 22% Matorral BARREN LAND (ROCK) BARE SOIL EVERGREEN FOREST ROQUEDOS SUELO DESNUDO FRONDOSAS SIEMPRE VERDES

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17 Future plans Convert the layer in an operational product and create historic yearly layers. Add as many optical satellite image covers as possible. The phenology differences among crops are the key factor. Test with some radar polarimetric images from Sentinel-1 in the 2015 layer. Use of Sentinel-2 data in season 2015/ Expected GSD: 10m

18 David A. Nafría Vicente del Blanco Download at hhtp://atlas.itacyl.es

19 Mid term execution accuracy Classification with data from March to 15th of June (2014) Classification with data from March to October (2014)

20 Mid term execution accuracy Cultivos 2014 (15/06) 2014 TRIGO 80,71% Cebada (13,8%) 85,96% Cebada (9,29%) TRIGO REGADIO 52,71% Trigo (25,25%) Cebada (7,80%) 68,46% Trigo (28,16%) Cebada (3,15%) CEBADA 88,22% Trigo (6,50%) 87,86% Trigo (5,91%) CEBADA REGADIO 33,44% Cebada (46,56%) Trigo (4,23%) 62,34% Cebada(36,43%) Trigo (3,74%) OTROS CEREALES 39,42% Trigo (22,03%) Cebada (21,31%) 44,59% Trigo (23,65%) Cebada (18,10%) OTROS CEREALES REGADIO 62,81% Trigo (13,8%) Cebada (9,72%) 90,89% Trigo (4,06%) Trigo Regadío (3,39%) GIRASOL 88,88% O. Leg. Grano (1,89%) 91,22% Suelo desnudo (1,89%) GIRASOL REGADIO 66,95% Girasol (21,95%) 85,20% Girasol (15,08%) ALFALFA 66,74% Alfalfa reg. (7,83%) Cebada (3,73%) 73,57% Forrajeras (5,44%) Alfalfa reg. (4,49%) ALFALFA REGADIO 84,27% Alfalfa (5,15%) Remolacha (1,27%) 90,86% Alfalfa(3,54%) Forrajeras (1,22%) MAIZ 92,36% Hortícolas (1,60%) 94,83% Hortícolas (1,31%) REMOLACHA 93,40% Hortícolas (3,18%) 96,66% Hortícolas (1,52%) PATATAS 87,02% Girasol (3,70%) 93,75% Hortícolas (2,50%) GUISANTES 54,43% O.Leg.Grano (12,9%) Cebada (12,18%) 72,31% COLZA 81,65% 90,11% VIÑEDO 88,38% 98,69% OLIVAR 93,07% 99,90% HORTICOLAS 97,95% 99,66% OTRAS LEGUMINOSAS GRANO 84,95% 93,54% FORRAJERAS 49,26% Cebada (15,28%) O.Leg. Grano(14,9%) 61,04% FRUTALES 98,88% 99,95% FRUTALES CASCARA 94,97% 99,47% PASTIZAL 88,87% 92,45% MATORRAL 86,11% 91,85% CONIFERAS 90,25% 91,69% FRONDOSAS CADUCIFOLIAS 88,62% 91,48% FRONDOSAS SIEMPRE VERDES 74,19% 76,46% AROMATICAS 99,30% 99,88% OTROS CULTIVOS INDUSTRIALES 99,69% 100% SUELO DESNUDO 63,93% Matorral (10,77%) O.Leg.Grano(4,4%) 68,91% Matorral (5,72%) Otras Leg. Gran (3,70%) ROQUEDOS 76,79% 80,91% URBANO-VIALES 99,24% 99,92% LAMINA AGUA 98,29% 98,29%